320700077 has 2 divisors, whose sum is σ = 320700078. Its totient is φ = 320700076.

The previous prime is 320700059. The next prime is 320700089. The reversal of 320700077 is 770007023.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 228040201 + 92659876 = 15101^2 + 9626^2 .

It is a cyclic number.

It is not a de Polignac number, because 320700077 - 2¹⁸ = 320437933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (320700007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160350038 + 160350039.

It is an arithmetic number, because the mean of its divisors is an integer number (160350039).

Almost surely, 2^320700077 is an apocalyptic number.

It is an amenable number.

320700077 is a deficient number, since it is larger than the sum of its proper divisors (1).

320700077 is an equidigital number, since it uses as much as digits as its factorization.

320700077 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2058, while the sum is 26.

The square root of 320700077 is about 17908.1008764190. The cubic root of 320700077 is about 684.4888132115.

The spelling of 320700077 in words is "three hundred twenty million, seven hundred thousand, seventy-seven".